Add tests for SSR + route.lazy (#11323)

Author: brophdawg11

packages/router/__tests__/ssr-test.ts

@@ -17,7 +17,12 @@ import {
 } from "../utils";
 import { deferredData, trackedPromise } from "./utils/custom-matchers";
 import { createDeferred } from "./utils/data-router-setup";
-import { createRequest, createSubmitRequest, invariant } from "./utils/utils";
+import {
+  createRequest,
+  createSubmitRequest,
+  invariant,
+  sleep,
+} from "./utils/utils";
 
 interface CustomMatchers<R = jest.Expect> {
   trackedPromise(data?: any, error?: any, aborted?: boolean): R;
@@ -293,6 +298,74 @@ describe("ssr", () => {
       });
     });
 
+    it("should support route.lazy", async () => {
+      let { query } = createStaticHandler([
+        {
+          id: "root",
+          path: "/",
+          async lazy() {
+            await sleep(100);
+            return {
+              async loader() {
+                await sleep(100);
+                return "ROOT LOADER";
+              },
+            };
+          },
+        },
+        {
+          id: "parent",
+          path: "/parent",
+          async lazy() {
+            await sleep(100);
+            return {
+              async loader() {
+                await sleep(100);
+                return "PARENT LOADER";
+              },
+            };
+          },
+          children: [
+            {
+              id: "child",
+              path: "child",
+              async lazy() {
+                await sleep(100);
+                return {
+                  async loader() {
+                    await sleep(100);
+                    return "CHILD LOADER";
+                  },
+                };
+              },
+            },
+          ],
+        },
+      ]);
+
+      let context = await query(createRequest("/"));
+      expect(context).toMatchObject({
+        loaderData: {
+          root: "ROOT LOADER",
+        },
+        errors: null,
+        location: { pathname: "/" },
+        matches: [{ route: { id: "root" } }],
+      });
+
+      context = await query(createRequest("/parent/child"));
+      expect(context).toMatchObject({
+        actionData: null,
+        loaderData: {
+          parent: "PARENT LOADER",
+          child: "CHILD LOADER",
+        },
+        errors: null,
+        location: { pathname: "/parent/child" },
+        matches: [{ route: { id: "parent" } }, { route: { id: "child" } }],
+      });
+    });
+
     it("should support document submit navigations", async () => {
       let { query } = createStaticHandler(SSR_ROUTES);
       let context = await query(createSubmitRequest("/parent/child"));

packages/router/__tests__/utils/utils.ts

@@ -1,7 +1,11 @@
 import type { AgnosticDataRouteObject } from "../../utils";
 
+export async function sleep(n: number) {
+  await new Promise((r) => setTimeout(r, n));
+}
+
 export async function tick() {
-  await new Promise((r) => setTimeout(r, 0));
+  await sleep(0);
 }
 
 export function invariant(value: boolean, message?: string): asserts value;